For simulating the drift and dispersion the considered substance is represented as a
"cloud of particles" (the Lagrangian method) in this model. The particles drift under the influence
of the ocean currents. Swimming objects are additionally transported by a certain percentage of the
wind velocity. Further, in oil drift simulations the physical behavior of the different oil classes
on the water surface or in the water column is considered.
Simulation of an oil spreading: oil particles black, wind red arrows
The Lagrangian model is predominantly used to support the coast guard in recent marine pollutions.
It is also possible to perform drift predictions for floating persons or objects (ships,
loading gone overboard, etc.) with this model as well as drift and dispersion simulations for oil
and water solvable chemicals. Further the model is often used to determine the origin of substances.
It is therefore an important mean for identifying possible polluters.
Overview dispersion models
Overview operational models
The latest version of the Lagrangian drift model is called